Boiler.



No. mamma'.V Patented Nov. u, |902.

c. n. cowLEY & H. c. (momia.

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lApplcation med Apr. 1 1901.) (no Model.)

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-recting passage-ways forming the generating portion, and communicating passages bevof these deilecting and controlling walls, be-

i UNITED STATES CHARLES R. cowLEY, oF EvEEE'rT,

MASSACHUSETTS, AND HOWELL C.

COOPER, OF OIL CITY, PENNSYLVANIA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 713,068, dated November 11, 1902.

Application filed April 1, 1901.y

T0 all whom it magazin/cern: '4

Beit known that we, CHARLES R. COWLEY, of Everett, county of Middlesex, and, State ofv Massachusetts, and HOWELL C. COOPER, of l Oil City,county of Venango,and State of Pennj sylvania, have invented an Improvement in Boilers, of which the following description,l in connection with the accompanying drawings; is a specification, Ylike letters on the drawings representing like parts.'

Our invention relates to that class of boilers combining the lire-tube and water-tube types in which the water tubes or shells containing the fire-tubes receive upon their ex;-V terior surfaces the direct radiant heat from the iire, which next passes at a somewhat lower temperature through the re-tubes and is Vfinally liberated into the uptake at a reduced temperature. The object of this class of boilers being to provide a construction that may be safely worked at the high pressures now required for multiple-expansion engines and still retain, as they do, the use of firetubes, it is important that the pressure-bearing joints and connections be made as few as possible. To this end we have designed a type of boiler having one or more water tubes or shells containing re-'tubes and certain diing portion of the boiler, a steam and water drum with contained baiie and directing passage-ways forming 'the disengaging portion of the boiler and placed above the generattween the said generating portion'andsteamv and water drum at or near one end only of the generating portion containing deflecting and controlling walls. It is evident that all ing internally disposed, are not subject to the boiler-pressure and merely provide passageways to direct the outowpand inflow of the water and steam from the generating portion to the drum. y

Figure 1 is a vertical section of the fixedfire-tube type of boiler embodyingthe in vention; Fig. 2, a section of one water-shell with its contained Iire-tubes of the removgenerating elements; and Fig. 3 is a sectional detail on an enlarged scale. f

In either the Xed-iire-tube type or the removable-ire-tube type Ythe general arrange- 'serial No. 53,913.

(No model.)

ment of the generating portion, steam and waterfdrum, and communicating passages is the same.

Referring to Fig. 1 the generating elements a, of which there may be any number desired, are shown as placed one above the other in a slightly-inclined position over the grate b,and communicating at one end only of each with a disengaging element or steam and water drum c, mounted above them, the whole being inclosed in a casing d. The direction of movement ofthe products 0f combustion and the currents of fluid are indicated by the arrows. c

The communicating passages are shown as provided with deiiecting-walls, whereby the separated water from the drum c, together with the feed-water enteringat the pipe e, are guided and deflected to the lowest points of each generating element, and the steamladen water is deflected and guided from the generating-shells into the drum c. As herein shown, a deiectingwall f is extended through the generating elements into the drum c, near one end of the former, and said wall is supplemented by a duct f2, leading to the opposite end of the generating element,

ih'ecooler water passing down at one side of the wall and passing through the ducts,while the heated water and steam rise Yinto the drum at the other side of said wall, the circulation thus set up being indicated by the,

arrows. i

A hand-hole g is provided in each generating element by removing the cover g2, of which the duct ortube f2 may be withdrawn and the interiorgof the generating element inspected, cleaned, &c. A blow is also provided, as shown at h, whereby the lime, sediment, dto., may-be removed. l A drain-plug at the lowest exterior point of each generating-shell is also provided. The lower ends of the generating-shells are supported' by' the baffle-wall t'. l

In Fig. 2 the lire-tubes a2 andheads 0:3 a4 and the portions fB of the deiie'cting-walls f arearran ged to be removed as a unitfrom the generating-shell a for the purpose of inspection, cleaning, repairs, &c. The jointr between the head a3 and the water-shell iiange 0,80 is made with a suitable gasket, such as a copper ring am, adjusted by bolts u32, and the head is irmly seated and rigid.

IOO

In order to compensate for variations in expansion and contraction, the head a4 at the opposite end of the shell is provided with a packing device of novel construction, which forms a feature of the present invention.

As shown in Fig. 2 and on a larger scale in Fig. 3, the shell a and tire-tube head a4 are bored out to form a channel L40 along the line of junction between the said shell and head, and in the said channel is placed an annular gasket of, which is V-shaped in cross-section, the legs or members of the V engaging with the bottom of the channel and spanning the joint between the plate and the cylinder, as clearly shown in Fig. 3. The said gasket is held in position by means of a follower' a, which is bolted to the tire-tube head a4, as by the bolts @43, which may, if necessary, be provided with a covering a (not shown in Fig. 2) to protect the bolts from the heat. The said gasket affords a water-tight packing and at the same time admits of variations in expansion and contraction between the shell and the lire-tubes, since it will yield to pressure and still cover the joint if there is a change in the relative positions of the fire-tube head and the end of the shell due to unequal expansion of the said parts.

The hand-hole g, Fig. 1, is shown as provided with a removable cover g2, the construction being such that the said cover is held in position by means of a stay-rod bolt g3,which extends completely through the water-shell and is screwed or otherwise fastened to the opposite end thereof. The said bolt is provided with a flange or shoulder g4 to engage a spider g5,which bears against the inner surface of the shell adjacent to the hand-hole, and the cover g2 is clamped against the outside of the hand-hole by means of a nut gs, in conjunction with the shoulder and spider aforesaid. The said rod-bolt thus not only strengthens the construction, but also affords fastening means for the hand-hole cover, and the bolt may be removed, ifdesired,or the duct f2 may be taken out without bodily removing the said stay-rod bolt by merely loosening the said bolt to release the spider, which can then be turned and withdrawn through the hand-hole, leaving the opening clear for the removal of the duct.

We claiml. Aboilerhavingagenerating portion provided with fire-tubes, and a steam and water drum above said generating portion; communicating passages between said generating portion and said drum; and means for de- Iiecting or controlling the currents through said passages to set up a current in a direction substantially parallel to the tire-tubes.

2. Aboilerhavingagenerating portion provided with clusters of tire-tubes, anda steam and water drum above said generating porstion; communicating passages bet-Ween said generating portion and said drum; means for deiiecting or controlling the currents through said passages to set up circulation;

and means for removably securing said clusters of fire-tubes.

3. Aboilerhavingageneratingportion composed of one or more cylindrical water-shells having fire-tubes passing through said shells; a steam and water drum composed of a cylindrical shell arranged' above said generating portion and communicating passages between said portions; and internal walls so`arranged as to form two or more passage-ways extending from that part of each of said cylindrical water-shells which is farthest removed from the drum to the interior of said drum.

4. A boiler having a generating portion composed of a cylindrical water-shell having firetubes passing longitudinally entirely through it and fastened into suitable fire-tube heads, said boiler being so arranged that said firetubes and heads may be withdrawn and replaced at will as a unit; a steam and water drum above said generating portion and communicatin g passages between said generating portion and said drum; and internal walls so arranged as to form two or more passageways extending from the lowest point of said cylindrical water-shell to the interior of said drum, a portion of said walls being arranged to be withdrawn with the fire-tubes and their heads as a unit for the purpose of cleaning and repairs, substantially as described.

5. A boiler havingagenerating portion composcd'of a cylindrical water-shell containing fire-tubes extending through it and expanded or otherwise secured at each end into firetube heads; a steam and water drum above said generating portion; and communicating passages between said generating portion and said drum provided with internal walls forming ducts or passage-ways extending from that part of each cylindrical water-shell which is farthest removed from the drum to the interior of said drum, parts of said internal walls being removable through hand-holes properly located with respect to said removable parts whereby access to each water-shell is afforded, substantially as described.

6. In a boiler the combination with a water tube or shell of fire-tube heads therefor; one or more tire-tubes extending from one of said heads to the other; a delecting wall placed inside of said water-shell dividing transversly the interior of said shell; a removable duct extending through said deflect- IOO ing wall in the shell; a hand-hole to a'ord access to said water-shell and allow the withdrawal of said duct, said hand-hole being provided with a cover; and a stay-rod bolt to hold said cover closed, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

CHARLES R. COWLEY. HOWELL C. COOPER. Witnesses:

HENRY J. LIVERMORE, J As. J. MALONEY. 

